magee



(No Model.)

J. OUMMING &J. H. MAGEE,- Jr.

PLUE' CUTTER. No. 501,269.

Patnted July 11, 1893.

Izaentors: I I S C/mmm'xmd.

Witnesses:

UNITE STATES ATENT GFFICE.

JAMES OUMMING AND JOHN H. MAGEE, J R., OF BUFFALO, NEW YORK, ASSIGNORS OF ONE-THIRD TO ALLEN VAIL, OF SAME PLACE.-

FLU E-CUTTER.

SPECIFICATION forming part of Letters Patent No. 501,269, dated July 11, 1893.

' Application filed January 16, 1893. Serial No. 458,488. (No model.)

To all whom it may concern:

Be it known that we, JAMES CUMMING and JOHN H. MAGEE, J r., citizens of the United States, residing at Buffalo, in the county of Erie and State of New York, have jointly invent-ed certain new and useful Improvements in Flue-Cutters; and we do hereby declare that the following description of our said invention, taken in connection with the ac-.

companying sheet of drawings, forms a full, clear, and exact specification, which will enable others skilled in the art to which it appertains to make and use the same.

Our presentinvention has general reference to improvements in flue cutters; and it consists, essentially, in the novel and peculiar combination of parts and details of construction as hereinafter first fully set forth and described and then pointed out in the claims.

In the drawings already referred to which illustrate our invention more fully, Figure 1 is a plan of our improved flue cutter. Fig. 2 is a longitudinal sectional elevation in line m w of Fig. 1. Fig. 3 is a similar view showing the flue cutter as applied to trimming the outer projecting end of a flue or tube. V Fig. 4 is a similar view illustrating the cutter in the act of cutting out a flue. Fig. 5 is a sectional view of the device in line y y of Fig. 4. Fig. 6 is a similar View showing a modified form of the mandrel.

Like parts are designated by corresponding letters of reference in all the figures.

The object of this invention is the production of a simple, cheap and eflficient flue cutter, which is especially designed for use in connection with the Allen Vail flue cutting machine, patented November 18, 1890, No.-

440,797 but which may also be readily used as a hand cutter without changes or modifications. To attain this result we construct this cutter substantially as follows:

A represents the mandrel of our flue cutter. It consists of a tool-steel tempered rectangular bar having on one end a cylindrical,or angular shank a, for attachment to an ordinary and well-known handle for operating the device by hand, or to the spindle of the Vail machine heretofore referred to, a collar a, and a tapering portion A, having in its upper face a dove-tail groove A, formed by the two inward projections b, b. Upon thi b d 'tion A is arranged a barrel or sleeve B, hav- 'it may be movably placed upon said bodyportion, and transversely through it at or near one of its ends a further aperture B, within which is located a cutter block or carriage, C, carrying the flue cutter D. This cutter block fits with its lower end the dove-tail groove A so that, the mandrel A being pushed through the sleeve B, the cutter block will be caused to move outwardly or inwardly and so that, when the sleeve B is adjusted Withina boiler flue E, by bearing with its adjustable collar F against the outer end of said flue E in the flue-sheet G, and the mandrel A grad- -ually pushed into the sleeve B and at the same time revolved, the cutter block will be moved outwardly and the cutter 0 work its way through the flue, as indicated in Fig. 4E, and cut the same 06 a certain distance from the flue sheet, which distance may be regulated by adjusting the collar F and holding it' in position by the set-screw f. Upon the sleeve B there is a further removable sleeve, H, having one or more longitudinal slots it, one ofwhich is located opposite the cutter block 0 so that when it is desired to cut off the outerprojecting end of a flue, as shown in Fig. 3, the cutter D in working its way through the flue E can finally enter the slot h in said sleeve H to free itself in cutting and for other obvious purposes. This sleeve H is adjustable upon the sleeve B so as to regulate the distance at which the outer end of the flue is to be trimmed off. It will now be readily observed that this flue cutter, to be useful for cutting off all sizes of dues, requires various sized sleeves B and H, each being provided with its own cutter block 0 and cutter D, the cutter block 0 being made higher as the sizes increase in diameter, but always so planned that when the mandrel is nearly pulled out to bring the smallest end nearest to the sleeve B and hence the cutter block 0 into its lowest practical position, the sleeve B will readily enter that size of boiler flue for which it is designed.

In Fig. 5 of the drawings we have shown the lips I) b to be prismatic in shape. This, however, is non-essential since they may be rectangular, as shown in Fig. 6, or any other desirable contour that can be readily produced by planing, milling or similar tools as long as there are in the groove A shoulders I) b which cause the cutter block 0 to be drawn outwardly when the mandrel is pulled in the proper direction and to retain it in place in the sleeve B, which it would not be capable of doing were these projections 17 b not present. It will be further observed that this entire flue cutter can be readily produced with ordinary machinists tools and facilities and that, therefore, it can be cheaply man ufactured and sold. The cutters D are of the usual circular form and are pivoted within the cutter block 0 upon the pin d. When it it is desired to sharpen or replace this cutter it is readily removed from the block by withdrawing this pin d.

Having thus fully described our invention, we claim as new and desire to secure to us by Letters Patent of the United States 1. As an improved article of manufacture, a flue-cutter having a rectangular, tapering body A, provided with the shank a on one end and the dove-tailed groove A" in its face; a sleeve upon said body and having a longitudinal, rectangular, non-tapering aperture as described and a further rectangular aperture radiating from said longitudinal aperture; a cutter-block C, in said radial. aperture and provided with a cutter D, said cutter-block having its lower face beveled to fit the taper of the body A and provided with a tongue engaging the dove-tail groove in the face of said body; a collar F, adjustably retained upon said sleeve B by the set-screw f, and a further, tubular sleeve H, over the sleeve 13 and provided with the slots h, as and for the object specified.

2. In an improved flue cutter, the rectangular tapering body A provided with a shank a, on one end and a dove-tail groove A in its face, a sleeve B, upon said body and havin g a radial aperture fitted with a cutter block having a circular cutter, a collar upon said sleeve and an outer slotted sleeve upon said sleeve B, as and for the purpose set forth.

In testimony that we claim the foregoing as ourinvention we have hereunto set our hands 50 in the presence of two subscribing witnesses.

JAMES OUMMING. JOHN H. MAGEE, JR. Attest:

MICHAEL J. STARK, WM. A. STARK. 

